Sewing-machine.



A. R. SCHENKY.

mmm MACHINE.

APPLICATION FILED JAN. 9. 1913. 1,1242535, Patented Jau. i2,

' 2 SHEETS-SHEET 1.

A. B SCHOENKY.

SEWING MACHINE.

APPLICATION FILED JAN.9, 1913. l glyfg, .aente Jan. i2, 19H1.

2 SHEETS-SHEET 2.

.545 i .i rwx'un @www a j AUGUST B. SCHOENKY, 0F SOMER'VILLE, MASSACHUSETTS,ASSIGNGR T0 THE REECE SHOE MACHINERY COMPANY, OF- BOSTON, MASSACHUSETTS, A CORPORATION OF' MAINE;

aiaasaa.- y

Spcication of Letters Patent.

sEwfivG-MACHINE.

' Patented Jan. 12, 1915.

application med Januaxy e, 1913.- seriai ne. 740,929.

To-aZZ whom t may concern Be it known that I, AUGUST R. SCnoENKY, a citizen of the United States, residing at Somerville, in the county of Middlesex and in' cong'unction therewith so as to interlock thetwo threads in the sewing operation. The present invention is herein shown for convenience as'applied to the class of inachines used in the manufacture of shoes by. 'the welt system wherein the outsole and welt are sewed'together. An example vof that -class of machine is illustrated in my prior application, Serial No. 722,300, filed Sep- 4 tember 25, 1912.

An object of the present invention is` toA generallyimprove the construction and .op-

eration of sewing machines of the class labove referred to.

A, particular object of the 'present inventionisto aord an improved ,mechanism for manipulating the under thread, the same 'possessmg greater reliability in operation,

` simplicity and durability.

` Another object hereof is to improve and render positive the feeding of under thread as required foreach stitch in conjunction l with the take-'up mechanism therefor.

Other objects and advantages pertaining tothe present invention will appear inthe hereinafter following description or will be apparent to those skilled` in the art.

Tov .the attaining of such objects and advantages, Ithe present invention consists in i the novel combinations, arrangements, 'devices and parts set forth, described and illustrated in the following description and accompanying drawings.

"l will first describe one form of machine ,embodying my improvements and will t erelafter point ,outl the novel features inf-the claims. y

vIrr the' accompanying' drawing forming apart' hereof Figure'l is a left elevation of a vsole sewing machine embodying-my invention, or rather the upper portion of such a machine, the supporting post 1 being broken off as shown instead of being illustrated as extending to the Hoor. Fig. 2 is also a left hand elevation, but only of the special parts to which the claims are vdirected and on an enlarged scale. Fig. 3 is a front elevation of some of the parts seen in Fig. 2. Fig. 4

is a. left hand elevation partly in section upon the plane 4 1 of Fig'.- 3. Fig. 5 is a similar 'viewon the plane '5-5 of Fig. 3. Fig. Gis a central longitudinal section on the plane 6 6 of Figs. 2 and 4.

Similar numbers of reference designate corresponding parts in the'several figures of thedrawings.

While agcomplete description of the general parts of the machine is not necessary, I will-refer to some of them for the purpose of showing the' general arrangement of the parts and their relation to the thread mechanism. It will be understood lthat the machine illustrated in Fig. 1 fis a waxed thread sewing machine of the class vreferred to. Extending upwardly from any convenient base is post 1 supporting at its upper end the headcasting- 2, which will be of a complicated nature unnecessary to' describe, it affording supportffor various parts of the machine The main shaft 3 is in the upper right and having bearings in hangers 4, and the shaft may be driven by pulley or otherwise. cams for the machine, including the cam 8 shown inFig. 1 and a similar cam concealed behind cam 8 the groove of which is seen in dotted lines. l

The shuttle case casting 10 may be located as usual and it` will be understood that the shuttle, which is of the circular type, contains a bobbin, the-latter being retained in place by the bobbin retainer 14, whichrl'atterthe operator may open at will by depressing the knob 149 as in said prior application.

In a waxed thread machine it is necessary to keep the parts heated and for this purpose steam pipes 15 are shown in variouslocations, and steam containers or boxes, for example the steam box 16 for heating. the shuttle, the steambox, 17 for heating the lauxiliary .take-up."-

' part of the machine, extending from left to Carried on theshaft are the necessary Atake-up 30, the main take-up 31 and the thread lock or locking wheel 32. The course of the thread may be from a waxl pot at the rear, it passing forwardly and making somewhat over a complete -turn around the groove in thewheel 32 thence to the auX- iliary take-up and around it, and thence around the wheel on the main take-up and thence to tlielooper 28.

Referring agaln to the main shaft and the A cams thereon, a cam groovey 33 is seen in dotted lines in Fig. 1, this cam having connections which will be hereinafter described for oscillating the take-.up shaft. The cam 8 has a groove 42 for actuating the needle guide and a groove 43 for giving oscillatory motion tothe shuttle. The connections be tween cam 42 and the needley guide may comprise a bell crank lever 101, having a rack 103 at its forward end for driving the pinion on the needle guide shaft. The cam 43 may actuate the shuttle through a cam l lever 59'having a. toothed rack at its forlward end connected through gears and pin-4 ions with the shuttle driver.

The reference numerals as hereinbefore used correspond with those in my saidprior application. IThose hereinafter used donot so correspond.

The to-and-fro moving take-up is shown in the form of an oscillating arm 31 which. Amay have a pulley 45 at its extremity, and

the .arm 31 may be secured to a take-up shaft 46. In order to oscillate the shaft for causing the take-up movements theI shaft may have at its further end an arm 47 shown in dotted lines, connected by a4 link i 48 to the lower end of a cam lever 49 (see Fig. 1) which is pivoted intermediate its ends at 50 and which at its upper end has ya stud 51 engagingthe cam groove 33 before mentioned.` By this train of parts the rotation of-the main shaft causes the oscillation of the take-up shaft.

f :Referring to the auxiliary take-up 30, it

may consist of a short oscillating arm mov-v able between an upper stop 34 and a lower stop 35, and a spring 36 may be used to press the auxiliary take-up toward lits upward po` lsition. l

, Referring nowto the thread lock 32, it is shown in the form of a locking wheel of the type l.having a.' yperipheral V-groove 'with cross perforateas to'gv ,the Wheel a gripwith a recess 64 in which is mounted a fricping hold upon the thread. I 4find that this absolutely locks the thread when the wheel is held from rotation.

As will be seen the lock wheel and the take-up shaft are concentrically mounted. This arrangement may be effected by means of a fixed sleeve 52 projecting liftwlse from the frame of the machine (see Fig. 3). The take-up shaft 46 passes within the sleeve 52.

- The lock 'wheel 32 and its integral sleeve or hub 53 surround the sleeve 52. The take-up arm being secured on the end of its 'shaft by a locking nut all of the parts are maintainedin proper relative position.

According hereto the lock wheel 32 is adapted to be normally held stationarily or locked fast by locking devices operating upon the hub 53 of the lockv wheel. These locking devices may for convenience be constructed as follows:

' An annular casting 54 surrounding the lock wheel hub is rendered relatively fixed in position by means of a toothed extension 55.- This annular casting-or sleeve 54, which is shown in cross section in Fig, is provided with a tangential bolt passage as shown, it being closed by a plug 56 at the left end and containing a friction lock or bolt 57 which is pressed forwardly by springs 58.

The forward movement of thethread wheel 32 is a leftwiserotation, therefore the' friction-bolt v57 effectively locks the wheel against advance, the bolt having an inclined or wedge surface 60, which causes the parts to bind and prevent improperor excessive movement.

For unlocking the thread wheel so as -to permit feeding movement at the proper times, the wedge or bolt 57`may be provided at its outer end with a contact or roller 61 adapted to be engaged and operated by a contact or cam 62 on the take-up in a manner that will hereinafter appear.

Having described the mode of locking and unlocking the thread feedingjfdevice or thread wheel I will now describe the manner of positively advancing it at the proper time so as to feed a definite amount of thread for each stitch to be formed.

Surrounding the thread wheel hub 53 and locked alongside of the annularcasting 54 is a second annular .casting or sleeve 63 which may be termed the feed sleeve. This, as shown in F ig. 4 is provided at one side tionypawl or grip v65, in 'such away that normally the pawl is out of engagement4 lwith the wheel hub 53, but when ylifted is thrown into gripping engagement so thatl further lifting manifestly causes the 'leftwise rotation of the hub and the consequent advance of the thread wheel. The normal position of these parts is as shown in Fig. '4 in Vwhich is seen .a spring (i6-tending toreturn the partstofnormalposition, this spring being secured at its forward end to said lug 67 coperating with a stop 68` formed on the casting 54. Whenever the sleeve 63 is rotated leftwise and released the spring 66 brings the stop 67 'back into contact with stop 68. y

For the purpose of lifting the pawl 65 to effect the described operations a contact or screw 69 may be employed, this being shown mounted on the take-up 31. This contact 69 is in the form of a screw for the purpose of adjustment, and a lock nut 70 is shown for securing it in adjusted position.

The operation of the parts as so far described may be as follows: It will be understood that the take-up arm moves ay given distance upwardly to permit the interlocking ofthe two'threads at each stitch, and.

then downwardly to take up the excess thread, and this taking up action continues through the entire down stroke of the takeup. After each stitch and before the next one a given amount of thread must be provided for the subsequent stitch. Ordinaril this additional thread is provided throug the pull of the `thread itself upon its holding or guiding devices. According `to the present improvement, however, the exact amount of thread required is positively fed from the locking devlce or wheel. I prefer to effect this during the upward or return stroke of the take-up.' Thus, before the take-up reaches its 4highest position two things occur.l First, the contact or cam. 62 engages the lock bolt 57 to force it rearwardly and 'thus unlock the wheel 32.

Thereupon the contact or screw 69 engages and presses upwardly the 'pawlor rip 65, lifting it and causing it to' grip and toirotate leftwise the hub 53 of the lock wheel. The grooves of theqlock wheel, engaging the thread by a non-slipping engagement, draw thread from the supplyand force thread toward the auxiliarv take-up. The quantity of thread thus advanced is thereby made available for the 'subsequent stitch. 1 This lquantity is regulated by adjusting the screw contact 69. he sooner the screw contacts with the pawl 65 the more thread is fed at each'stitch. On the subsequent downward movement of the take-up the pawl 65 is disengaged andthe locking bolt 57 is disengaged, thus restoring the original locked ,condition of the wheel 32.

In addition to the regulation already referred to another regulation of the thread y feed is'rendered' possible through the simultaneous adjustment about the take-up shaft 46 of the two annular castings 54 and 63.

Thus the toothed extension 55 engages the teeth of a pinion 7-1 which in turn engages a second pinion 72 upon whose shaft'is an arm 73 connected bv a link-74 to the presser foot lever 75 (see Fig. l). By this arrangeness.

It will thus be seen that I have described a machine embodying the principles of the present invention and possessing the advantages referred to. Since the described mechanism might be indetinitely varied as to details without departing from the principles involved, I do not wish to be restricted to the particular details recited except in so far as they are-referred to in the appended claims.

What I claim and desire to secu-re by Letters Patent is:

1. In a sewing machine the combination' of a take-up, means for moving the takeup through its take-up stroke and return stroke, means for locking the thread against advancing from the supply, and means whereby the take-up on its lreturn strokey first releases said locking means and then advances the thread.

2. In a sewing machine the combination of a take-up, means for moving the take-up through its take-up stroke and return stroke, means for locking the thread against advancing from the supply, means for advancing the thread from the supply, and connections whereby the take-up on its return stroke first releases said locking means and then operates said advancing means.

3. In a sewing machine the combination of a to-and-fro moving take-up, a movable thread lock, means for reciprocating the take-up through its take-up stroke and return stroke, and mechanical connections by which the take-up upon each ret-urn stroke releases-and then advances the thread lock, comprising a contacting means carried by thek take-up coperating with the thread loc 4. In a sewing machine the combination of a to-and-fro moving take-up, a movable thread lock, means for reciprocating the take-up through its take-up stroke and return stroke, and connections by which the .take-up upon each return stroke advances the thread lock, comprising contacts opertively adjusting the contacts to vary the amount of thread measured. j

5. In a sewing machine the combination of a to-and-fro 'moving take-up, a movable" thread lock, means for reciprocating the take-up through its take-up stroke and return stroke, and connections by which the, take-up upon each return stroke advances the thread lock, comprising contacts operated bv the take-up, and means for relatively adjusting the Vcontacts to vary the amount' of thread measured controlled by a -work engaging member in accordance with the thickness of the work.

' 6. In a sewlng machine the combination of a to-and-fro moving take-up, a movable thread lock, means for actuating the takeup, and connections by which the take-up at, each stitch advances the thread loch, said thread lock having a locking device and an advancing device, the connections from the take-up acting to first open said locking device and then move said advancingdevice.

7. Ina sewing machine the combination of an oscillating take-up, a movable thread locking wheel, means for actuating the take up to oscillate over a fixed path to take up thread and return, and connections from the take-up for positively advancing said. wheel, on each return stroke of the take-up.

8. In a sewing machine the combination of an oscillating take-up, a'movable thread loclingwheel, means for actuating the take up' to oscillate over a fixed path to take 'up thread and return, and connections from the take-up for positively advancing said wheel,

on each return stroke of the take-up,'said connections comprising an adjustable contact.

9. In a sewing-machine the `combination -of an oscillating take-up, a movable thread locking wheel, means for actuating the take up to oscillate over a fixed path to take up thread and return, take-up for positively advancing said wheel, on each return stroke of the take-up, said connections comprising an adjustable contact and. means for unlocking the wheel before said contact comes into play.

10. In asewing machine'the combination of an oscillating take-up shaft, .a take-up thereon, a fixed sleeve about said shaft, a movable thread locking Ml having its hub about said sleeve, a hub clamp about said hub, a wheel advancing device about said hub, and means carried by said take-up for operating said clampand advancing means in harmony. Y

11. In a sewing machine the combination of an oscillating take-up shaft, a take-up thereon, a fixed sleeve about said shaft, a movable thread lockingwheel having its hub about said sleeve, a hub clamp-about said hub, a wheel advancing device about said hub, and means carried b v said take-up for in harmony,

and connections fromthe operating said clamp and advancing means in harmony, and meansfor adjusting said operating means to regulate the thread feed.

thereon, a fixed sleeve about said shaft, a Y' movable thread locking wheel having its hub about said sleeve, a'hubclamp about said hub, a wheel advancing device about said hub, and means carried by said take-up-for operating said clamp and advancing means and means for adjusting said operating means to regulate the. thread feed, andv other means forautomatically simultaneously ladjusting said clamp and advancing means to vary the amount of feed.

l13. In a sewing machine the combination of athread gripper, a gripper actuating meansfor positively advancing the thread, a gripper locking means for A preventing thread advance, a take-up movable through its take-up stroke and its return stroke, and

connections whereby the take-up on its re-v turn stroke first releases said locking means and then operates said actuating means.

14. In a sewing machine the combination of a rotatable thread wheel adapted to peripherally grip the thread at a -point between the thread supply and take-up, a take-up movable through its take-up stroke and return stroke, locking means adapted to lock.

said wheel and thereby lthe thread, `and connections whereby the take-up first releases said lockingmeans and then advances said Wheel a predetermined amount.

15.' In a sewing machine the lcombination of a rotatable thread wheel having a peripheral il-groove interrupted by lateral recesses along the groove base adaptingrit to securely grip the thread at a point' between the thread supply and take-up, a take-up movable through its take-up strokejand return stroke,`locking means adapted to lock said wheel and thereby the thread, and 'con nections whereby the take-up-first releasf sv said locking means and then advances sa d- Wheel a predetermined amount.

In testimony whereof I aflix my signati .re in presence of two witnesses.

AUGUST R. SCHOENK.i Witnesses:

J. WARREN NicHoLs, TnoMAs J. CARTY; 

